Nixdorf Donald R, Greiser Andreas, Hayes Carmel, Gaalaas Laurence, Groenke Beth R, Fuglsig João Marcus de Carvalho E Silva, Johannsen Katrine Mølgaard, Herman Cory R, Kaimal Shanti, Moana-Filho Estephan J, Mulet Mariona, Özütemiz Can, Spin-Neto Rubens
Department of Diagnostic & Biological Sciences, School of Dentistry, Minneapolis, Minnesota; Department of Radiology, Medical School, University of Minnesota, Minneapolis, Minnesota.
Siemens Healthineers AG, Erlangen, Germany.
Oral Surg Oral Med Oral Pathol Oral Radiol. 2025 Jul;140(1):113-124. doi: 10.1016/j.oooo.2025.02.011. Epub 2025 Feb 19.
We aimed to compare subjective assessment of image quality and rater agreement of magnetic resonance (MR) images of the temporomandibular joint (TMJ) acquired with dental-dedicated 0.55 T and clinical 1.5 T magnetic field strengths.
Six blinded raters evaluated randomized TMJ MR images from 5 healthy participants imaged with 3 pulse sequences on 2 scanners: a 0.55 T system using a custom-built surface coil for dental-dedicated applications and a clinical 1.5 T system using a standard head/neck coil. TMJ anatomy and image quality parameters were assessed using a three-point scale (0 = unacceptable, 1 = acceptable, and 2 = excellent). Data was pooled across participants, pulse sequences, and sides. Kappa coefficients were calculated for intra- and inter-rater agreement. Chi-square tests were applied to explore differences between scanners. Significance was established at P<0.05.
Four different raters preferred 0.55 T images for visualizing hard and/or soft tissue anatomy (P≤.02). One rater preferred the 0.55 T system regarding contrast. No other differences were detected regarding qualitative ratings. Kappa values for intra-rater agreement ranged from 0.49 to 0.70 for 0.55 T images and 0.42 to 0.71 for 1.5 T images. Inter-rater kappa values ranged from 0.02 to 0.29 for 0.55 T images and 0.02 to 0.23 for 1.5 T images.
Images from the two systems were rated similarly. Further research is needed to assess diagnostic performance in patients.
我们旨在比较使用牙科专用0.55T和临床1.5T磁场强度获取的颞下颌关节（TMJ）磁共振（MR）图像的图像质量主观评估和评分者一致性。
六名不知情的评分者对5名健康参与者的随机TMJ MR图像进行评估，这些图像在2台扫描仪上使用3种脉冲序列成像：一台0.55T系统，使用定制表面线圈用于牙科专用应用；一台临床1.5T系统，使用标准头/颈线圈。使用三点量表（0 = 不可接受，1 = 可接受，2 = 优秀）评估TMJ解剖结构和图像质量参数。数据汇总来自参与者、脉冲序列和两侧。计算评分者内部和评分者之间一致性的kappa系数。应用卡方检验探索扫描仪之间的差异。显著性设定为P<0.05。
四名不同的评分者更喜欢0.55T图像用于可视化硬组织和/或软组织解剖结构（P≤0.02）。一名评分者在对比度方面更喜欢0.55T系统。在定性评分方面未检测到其他差异。0.55T图像的评分者内部一致性kappa值范围为0.49至0.70，1.5T图像的范围为0.42至0.71。0.55T图像的评分者间kappa值范围为0.02至0.29，1.5T图像的范围为0.02至0.23。
两个系统的图像评分相似。需要进一步研究评估患者的诊断性能。
